aperture of a mirror 反射镜的口径 ; 镜口经
large aperture mirror support 大口径反射镜支承
large aperture optical mirror 大型光学镜面
It works by separating the mirror flip and aperture opening into two steps.
它将镜面翻转和光圈打开分为两个步骤。
When you press the shutter release on the camera, a complex sequence of events occurs, including setting the aperture in the lens, flipping up the mirror of an SLR and a lot more.
实际上，当你按下快门时，一套复杂的程序开启，包括镜头内光圈的设置、一块单镜头反射镜的升起和其他更多的步骤。
Actually, the mask and openings are not really necessary; the mirror alone could serve as aperture.
其实，挡光板及其上的开孔都是不必要的；单单反射镜本身就可以起小孔的作用。
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